libyul/optimiser/FunctionHoister.cpp


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/*
    This file is part of solidity.

    solidity is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    solidity is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with solidity.  If not, see <http://www.gnu.org/licenses/>.
*/
/**
 * Optimiser component that changes the code so that it consists of a block starting with
 * a single block followed only by function definitions and with no functions defined
 * anywhere else.
 */

#include <libyul/optimiser/FunctionHoister.h>
#include <libyul/optimiser/Utilities.h>
#include <libyul/AsmData.h>

#include <libdevcore/CommonData.h>

using namespace std;
using namespace dev;
using namespace dev::yul;
using namespace dev::solidity;

void FunctionHoister::operator()(Block& _block)
{
    bool topLevel = m_isTopLevel;
    m_isTopLevel = false;
    for (auto&& statement: _block.statements)
    {
        boost::apply_visitor(*this, statement);
        if (statement.type() == typeid(FunctionDefinition))
        {
            m_functions.emplace_back(std::move(statement));
            statement = Block{_block.location, {}};
        }
    }
    removeEmptyBlocks(_block);
    if (topLevel)
        _block.statements += std::move(m_functions);
}